Center Independent Energy, L.P. is a regional Shell, Marathon and Sunoco branded fuel distributor headquartered in Pittsburgh ... , Pennsylvania. The owners and staff members of CIE and their affiliated company, CIO Stores LLC, have experience with C-Store, Car Wash, Beer & Food Service, Commercial Fueling, and Service Bay operations. This experience is shared to help our customers during routine meetings. Programs and profit centers are constantly being developed for the benefit of both company and dealer operated locations. Today Center Independent Energy, L.P. supplies over 55 retail locations. read more